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Basic Influences on Population Size
Continue Human Country Comparison activity. (Spread out over several days, as portions of the class leave for freshman field trip.)

Exponential Growth: Draw and explain exponential population growth.
Take another yeast culture measurement. Students plot their yeast culture data, everybody enters their data into a class Excel spreadsheet. Notes on exponential growth, exponential growth equation. Students are asked for hypotheses on why populations grow exponentially and not linearly.